Milk is the "oil" of the food industry. It isn't some random commodity that isn't that important. It's very similar to the oil industry.

The US government even has a mandate to stockpile dry milk (powdered milk) just like oil reserves. Ocassionally US dairy farmers are paid to not produce milk and instead they act as commodity traders and only purchase and sell dry milk.

The US has, in the past, over-produced subsidized exports of milk in order to collapse dairy markets so they can take over other national markets, as a form of protectionism for their own dairy industry. Instead of regulation to protect their industry, they go on the offensive.

The common example is the Jamaican dairy industry. The US flooded their market with under-priced powdered milk. That, combined with a heavy-handed advertising campaign that claimed powdered milk was more healthy and had more nutrients, collapsed the national Jamaican dairy market entirely and they were left with no more dairy farmers on the entire island. They went from producing all their milk locally to today where they import almost all milk at the same price and sometimes higher. The re-investment for local production is too high.

Stories you here about "humanitarian relief" shipments of milk are also often market manoeuvres intended to flood and collapse local markets so they can't recover. This is why entire cargo ships full of "free" milk from the US sometimes get turned away, or countries will claim they are "tainted".

So this kind of thing isn't some "oh this is just some interesting weird milk thing," it is actually quite important in the grand scheme of things. It sounds like "ultra-filtered" milk concentrate is being positioned as a new "dry milk" since it can currently circumvent existing trade deals and tariffs that deal with dry milk.